Across
- 4. Basic unit in chemistry
- 5. How much something wieghs
- 7. Negatively charged atom
- 8. Particles are not compact but do not move free
- 9. Neutrally charged atom
- 10. Positively charged atom
Down
- 1. Made up of one type of atom
- 2. Particles roam freely
- 3. The amount of protons
- 6. Particles are compacted and vibrate in place